Smith & Wesson J-Frame revolvers have had your back since 1950. Weighing in at less than a pound, the S&W Model 637 Revolver features a lightweight aluminum frame, SA/DA trigger, low profile sights, a 1.875 inch stainless steel barrel, and holds 5 rounds of .38 Special +P ammo. Buy guns online from the best online gun store and get gundeals on S&W revolvers and bulk ammo from Machine Guns Kings today!